Jambs knowles



(No Model.)

J.. KNOWLES.

MBGHANIGAL MOVEMENT.

, UNrTnD STATES.

Barnim* Farce.

JAMES KNOVVLES, OF NEW YORK, ASSIGNOR TO IRVING M. AVERY, OF BROOKLYN,N. Y.

MECHANICAL MOVEMENT.

SPECIFICATION formingipart of Letters Patent No. 302,499, dated July 22,1884.

i Application filed June 5, 1884. (No model.)

1o means whereby the motions of an actuating or feed lever can beregulated and controlled. This I accomplish in the manner and by themeans hereinafter described and claimed, reference being had to theaccompanying draw- I 5 ings, illustrating my invention, in which-Figure'l shows a side view of my invention, partly in section. Fig. 2 isan end view, partly in section.

Similarletters indicate corresponding parts.

I My invention is here shown as applied to a sewing-machine, though ofcourse I do not confine myself to such application, as said improvementmay be applied wherever it is serviceable. l 2 5 The letter A representsthe feed-lever or actuating-lever, having a head, B, which is perforatedfor the passage of the main shaft C, to which shaft C a revolving orrocking or other suitable motion may be communicated. The head B isshown as adapted for the reception of an eccentric, E, by which, on themovement of the shaft C, motion is communicated to the feed-lever A. Thefeed-lever A is shown in the drawings as connected to a connecting 3 5lever or link, J, pivoted both horizontally as well as vertically to thebed-plate L, and which link J, in the example shown, communicates motionto a feed-dog, K, of a sewingmachine. In order to regulate the motion of4o the feed-lever A, the fulcrurn P of said lever is mounted on a block,N, which is adjustable in the slot m of the standard R, and can be heldat any point by a set-screw, O. By moving the block N nearer to the headB, the horizontal throw of that end of the leverA farthest from theshaft O will be increased, while by moving said block N farther from thehead B said horizontal throw is decreased, producing in the example inthe drawings a corresponding increase or decrease in the horizontalmotion or feed of the feed-dog K. The cam E also imparts a rising andfalling oravertical motion to the head B and lever A, thus causing inthe example in the drawings the feed-dog K -to rise above the base-plateL While said feed-dog is moving forward or feedthe feed-plate L whenmoving back or recovering its original position. To make the feeddog Krise higher or `lower above the baseplate L, it is only necessary toplace the adjustable link F on the lever Alower or higher on thefeed-lever A and secure it in such p0- sition by a set-screw, H, whenthe desired result will be attained. Ihelink F, in addition to beingvertically adjustable on the lever A, can also be turned or swiveled onsaid lever, so as to carry the end of the link J, connected thereto,farther to one side or theother.

When several movements are placed close together-as, for example, in asewing-machine, where the standard R contains both the feed-lever A asalso the shuttle-driving mechanism-the lever A, as seen in the drawings,must be placed to one side, to make room for the remaining movement ormovements. From this it results that the-link, and with it the feed-dogK, is carried too far to one side, or into such a position that thefeed-dog is likely to drop below the base-plate L before the fullforward or horizontal motion of said feed-dog is completed, thus causingan imperfect feed. rIo compensate for any such errors, I provide theadjustable link F, which, as already explained, can be placed oradjusted upon the feed or actuating lever A in such a position as willbe necessary to secure the result desired, which result in the examplein the drawings is a proper motion of the feed-dog. I may also split orcut the adjustable link F, as seen in Fig, 2, so that when the hollow orreceptacle in said link F for receiving the head of the link J isincreased by the walls or sides of said hollow being worn away, I needonly tighten the screw S, and by drawing together the sections of saidadjustable link F restore said hollow or socket to its original size.

ing, and causing said feed-dog to sink below Of course the device may bemodilied without departing from my invention, since, for example,instead of attaching the adjustable link F to the actuating-lever A andjoining said adjustable link F to the connecting-link J, I may attachsaid adjustable link F to the connecting-link J and join said adjustablelink F with the actuatingleverA, or the adj ustable link F may beconnected with that end of thc connecting-link J which lies neXt to thefeed-dog. Such transposition is obvious, and is within the scope of myinvention.

It will be observed from the foregoing that the adj nstment of the linkF enables the throw of the outer end of the link J to be changed orvaried as occasion may demand, and this can be effected withoutdisturbing or manipulating the movable fulcruni I), for the reason thatthe adjustable link is below the fulcrum.

I do not claim the diagonal cam on the main shaft combined with thepitman having a balland-socket hinge-connection with a lever, as shownin the drawings, as such features are not my invention.

Vhat I claim as new, and desire to secure by Letters Patent, is

l. The combination, with an actuating-lc- Ver, A, and a pivoted link, J,of an adjustable link, F, connecting the lever with the pivoted link,and by its adjustment changing the extent of throw of the outer end ofsaid pivoted link, substantially as described.

2. rIhe combination of an actuating-lever, A, a movable fulcrum, I), apivoted link, J and an adjustable link, F, arranged below the movablefulcrum, and by the adjustment of which the throw of the outer end ofthe pivoted link may be changed without manipulating the movablefulernm, substantially as described.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

J AMES KNOWLES. [n s] XVitnesses:

W. HAUPT, E. F. KAs'rnNHUnnn.

